Abstract:
:Intracerebral injection of kainic acid (KA) in rat brain was previously found to cause altered immunohistochemical recognition of connexin-43 (Cx43) epitopes (epitope masking) with different sequence-specific antibodies against this gap junction protein. We demonstrate here that similar alterations occur when nitrocellulose membranes containing protein transferred from fresh cryostat sections of KA-injected brain are probed with these antibodies (in situ transblotting), indicating that epitope masking is not a result of epitope alteration due to fixation conditions used in earlier studies. Alterations in immuno-recognition of astrocytic Cx43 subsequent to injections of NMDA were also observed and were similar to those seen with KA in some, but not all respects. The results provide further indications of Cx43 molecular modification in excitotoxin-lesioned tissue and suggest that the sequelae of reactions by astrocytes and their gap junctions in these tissues is dependent on cell-type susceptibility to excitotoxin action.
journal_name
Brain Resjournal_title
Brain researchauthors
Sawchuk MA,Hossain MZ,Hertzberg EL,Nagy JIdoi
10.1016/0006-8993(95)00337-psubject
Has Abstractpub_date
1995-06-12 00:00:00pages
153-7issue
1eissn
0006-8993issn
1872-6240pii
0006-8993(95)00337-Pjournal_volume
683pub_type
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